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     These are internal parts from a Sauer Danfoss fixed displacement motor that made part of a closed loop transmission of a Claas harvester. The insignificant damage that you can see on the pictures was caused by loss of lubricating oil film caused by low viscosity caused by high oil temperature caused by malfunctioning cooling system caused by lack of preventive maintenance caused by lack of maintenance at all... On these machines there's a small but very important thermal valve that operates cooler by-pass. This one malfunctioned just once... The pump ended up looking just about the same... Award winning pictures are the last two, showing two separated brass piston heads smashed and melted together by the hydrostatic fury...

    If you want to know more about these thermal valves, read the article about peculiarities of these hydrostatic transmissions.
Broken Sauer Danfoss series 90 fixed displacement motor
Broken Sauer Danfoss series 90 fixed displacement motor
Broken Sauer Danfoss series 90 fixed displacement motor
Broken Sauer Danfoss series 90 fixed displacement motor
Broken Sauer Danfoss series 90 fixed displacement motor
Broken Sauer Danfoss series 90 fixed displacement motor
Broken Sauer Danfoss series 90 fixed displacement motor
Broken Sauer Danfoss series 90 fixed displacement motor
Broken Sauer Danfoss series 90 fixed displacement motor